Ferrite and Common Mode Chokes - W4CAE

Ferrite andCommon Mode ChokesKevan Nason, N4XL I ve always been a bit bothered by baluns, since I was never sure what they are supposed to do, let alone how they might go about doing it. -Roy Lewallen, W7 ELRef 10 Common Mode CurrentRef 6 Common Mode Current is UNWANTED current flowing on the OUTER surface of the coax also occurs with other cables ( audio, USB, Microphone, etc.) Common Mode CurrentRef 15 Skin Effect makes antenna current flow on the inside of the coax braid because it is closer to the charge carried on the center conductorThe Pin 1 ProblemA reason why some things are more susceptible to RFI than othersK9YC Technical GroundingRef 1 Pin 1 Problems Are Not Limited To CoaxK9YC actually figured it out while working as an Audio Engineer at concertsPin 1 ProblemRef 4 Pin 1 ProblemRef 4 Pin 1 ProblemRef 4 Common Mode Cu

A Ham's Guide to RFI, Ferrites, Baluns, and Audio Interfacing, Revision 7, Jan 2019 by Jim Brown K9YC 2. Picture of Common Mode Noise Filters, Palomar-engineers.com 3. Ferrite Mix Selection, Palomar-engineers.com 4. Power, Grounding, Bonding, and Audio for Ham Radio by Jim Brown, K9YC 5. Amateur Radio (G3TXQ) - Common-mode chokes 6.

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  Guide, Ferrites, Balun, Guide to rfi, Fired trane

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